Two locations depending on RV
Or are you asking where the wall plate is?
Some RV's have a matrix switch, what I call a box of many buttons (BOMB) and yes, that is it.
Most of the rest have a wall plate,, 12 volt outlet, switch, light, antenna port.. That is it.. If there is a 2nd splitter (Say Rear/Outside) it will likely be behind that plate.. (Most folks improperly call it the booster.. Which is in the mast head (Antenna) it is the power supply/switch/splitter
Some few have the Sensar Pro (Wall plate with advanced features I highly recommend)
Some have a hidden splitter (VERY FEW) wall plate will have only an on/off switch and optional LED. Most of these do not have cable input.
Sometimes they do a great job of hiding that wall plate.. Was helping a fellow camper with a new THOR class C.. Could not find it,, Ended up downloading diagrams for the Junk ,er Jack antenna they had,< Finally found the thing hiding in a cabinet over the door.. BEHIND a 120 volt outlet with a wall wart plugged into it that completly hid the thing from view.. Amazing what lengths they go to to hide them. (the wal wart was for the jack signal finder thing which compared to what I use (Winegard Sensar Pro) is .. Well perhaps that first word was not a typo).
Home is where I park it!